Radioactive isotopes are
constantly spewed from the destroy Fukushima Daiichi nuclear plant and
are easily picked up by the jet stream and transported across the North
Pacific in storm systems. When these weather fronts hit the mainland,
the rains wash the radioactive particles out of the air and spreads
them over everything that receives precipitation. The
US West Coast and especially British Columbia, specifically the Vancouver
area, get hit the hardest. As the jet stream migrates up and down
the coast during the rainy season, the highest levels of radioactivity
will accumulate, logically, in the areas of higher rainfall.
The more the rain, the higher the radiation concentration in the soil.
The radiation, of course, is not all washed out at once and continues
to be transported and dumped on the US and Canada from West to East
with measurable amounts of contamination ultimately having been recorded
in multiple locations of Europe. Note - Some winter storm systems
come upward from the tropics and the Hawaii area (known as the 'pineapple
express' storms) are much less contaminated.

Everything from trees to shrubs and all agricultural crops uptake the
Fukushima radiation from the now contaminated soil and eventually spread
through the entire food chain. Nothing is spared. The hay
and grasses growing in contaminated soil are consumed by beef and dairy
cattle and that is how radiative isotopes wind up in the animals and
their milk products. That's why Cesium 137 was found in the milk of
Vermont dairy cattle in the months after the 3-11 disaster...and
that is why you'll hear nothing from the EPA about radiation in our
crops, meat and dairy products. Only covered greenhouses
were and are spared being hit with radioactive rains.